<div class="control-group">
    <div class="controls">
        <a   href="https://www.facebook.com/dialog/oauth?client_id={$smarty.const.APP_ID}&scope=email&redirect_uri={$smarty.const.URL_LOGAR_FACE}">
            <img border="0" alt="Botao Login Facebook" src="{$smarty.const.URL_PASTA_REDES_SOCIAIS}logar_facebook.png"/>
        </a>
    </div>
</div>